GUEDES, M. A.; http://lattes.cnpq.br/3173554474442621; GUEDES, Manoel Adalberto.
Resumen:
The objective of this work consists in: determine the physical characteristics of soybean,
beans and corn (length, width, thickness, circularity, sphericity, perimeter, projected area and
volume) by three methods; as the conventional method using a caliper and projection image
of the grain on the wall on graph paper and compare these values with the proposed
measuring method, which is the use of flatbed scanner for determine these characteristics
using techniques for digital image processing; determining the bulk and true density, and
make the determination of the porosity of the grain mass by calculation using the relationship
between the bulk and true density and compare with values of pycnometer; then it has stored
50 grains of each one of these cultivars in four containers sealed with a solution of water with
sulfuric acid in the B. O. D., for 120 days at 20 °C, in four moisture content 14, 16,18 e 20%
(w. b.); each ten days determined the range of colors, by two methods, one using a Minolta
colorimeter and the other to the digitalization of the same grain with flatbed scanner HP 2400,
to analyze the interaction of moisture content and storage time on the change in the color of
the tegument of grains. The values of moisture content to determine the physical
characteristics of soybean were 9.87, 13.7, 16.48, 18.2 and 19.76% (w.b.); the measurement
methods are statistically reliable, the true density, length, width, thickness, perimeter,
projected area and volume increased with increase moisture content, the bulk density,
roundness and sphericity decreased with increase moisture content, the intensity of the color
green and red, of the pattern RGB color, and the color coordinates L* a* b* of the pattern
CIELAB, decreased with increasing moisture content; the intensity of blue color was
increased with increasing moisture content. The values of moisture content to determine the
physical characteristics of the beans were 12.32, 14.18, 15.54, 17.11 and 19.52% (w.b.); the
methods used for measuring did not diverged in results among themselves, the true density,
length, width, thickness, perimeter, sphericity, projected area and volume increased with the
increase of moisture content, the bulk density and circularity decreased with the increase of
moisture content, the intensity of the color green, red, blue and the coordinated L*
decreased with the increase of moisture content and the color coordinates, a* and b*,
increase had with the increase of the moisture content. The values of moisture content to
determine the physical characteristics of the grains corn were 11.76, 14.03, 16.27, 19.50 and
20.50% (w.b.); the methods used for measuring not diverged in results among themselves, the
true density and bulk density decreased with the increase of moisture content; the length,
width, thickness, circularity, sphericity, perimeter, projected area and volume, increased with
the increase of moisture content; no significant variations in the histograms of corn grain.
